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2 years ago

Determine the half-life of a nuclide that loses 38.0% of its mass in 407 hours. 590 hours 281 hours 291 hours 568 hour 204 hours

Physics

1 answer:

alexgriva [62]2 years ago

3 0

The half-life of a nuclide is 737 hrs

Let the initial mass of nuclide is N° = 100

The final mass of nuclide after 407 hours

= 100 - 38 = 62

The expression for decay constant is

λ = 1/t ln(N°/Nt)

Substitute the given values and calculate the decay constant as,

λ = 1/407hr ln(100/62)

λ = 9.4 x 10^-4/hr

Now, the half-life is calculated as,

t1/2 = 0.693/λ

= 0.693/9.4 x 10^-4/hr

t1/2 = 737 hrs

Hence, the half-life of a nuclide is 737 hrs

Learn more about Half-Life here:

brainly.com/question/25750315

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3 years ago

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3 years ago

Assuming a 8 kilogram bowling ball moving at 2 m/s bounces off a spring at the same speed that had before bouncing what is the a

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a) 32 kg m/s

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$p_{fB}=m v_b =(8 kg)(-2 m/s)=-16 kg m/s$

The final momentum after the collision is the sum of the momenta of the ball and off the spring:

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b) -32 kg m/s

The change in momentum of bowling ball is given by the difference between its final momentum and initial momentum:

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c) 64 N

The change in momentum is equal to the product between the average force and the time of the interaction:

$\Delta p=F \Delta t$

Since we know $\Delta t=0.5 s$ , we can find the magnitude of the force:

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The negative sign simply means that the direction of the force is opposite to the initial direction of the ball.

d) The force calculated in the previous step (64 N) is larger than the force of 32 N.

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3 years ago

A pitcher throws a baseball towards home plate. The baseball, which has a mass of 142 g, approaches the plate with 128 J of kine

mylen [45]

Mass=142g
K.E=128 J
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v^2=128/72
v^2=1.777
by taking square rt
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3 years ago

Which of the following is NOT a characteristic of S waves?. A. They travel more slowly than P waves. . B. They are also called l

AfilCa [17]

Correct answer choice is :

B) They are also called longitudinal waves.

Explanation:

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3 years ago

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